Filter control device, filter controlling method, and imaging device

Abstract

A filter control device of the present disclosure includes a filter controller that performs control on a shot image to cause low-pass characteristics of an optical low-pass filter mounted in an imaging device to be changed in accordance with a magnification of the image, the magnification to be changed by image processing.

1 . A filter control device, comprising a filter controller that performs control on a shot image to cause low-pass characteristics of an optical low-pass filter mounted in an imaging device to be changed in accordance with a magnification of the image, the magnification to be changed by image processing. 
     
     
         2 . The filter control device according to  claim 1 , further comprising a sharpness correction processor that corrects sharpness of the image by image processing, wherein the sharpness correction processor changes sharpness correction characteristics in accordance with the magnification. 
     
     
         3 . The filter control device according to  claim 1 , wherein the filter controller sets the low-pass characteristics of the optical low-pass filter to be weaker than when the magnification is one time in accordance with enlargement of the image by image processing and detection or prediction of occurrence of aliasing. 
     
     
         4 . The filter control device according to  claim 3 , wherein, when the image is enlarged by image processing and occurrence of aliasing is detected or predicted, the filter controller sets the low-pass characteristics of the optical low-pass filter to be stronger than when the occurrence of the aliasing is not detected or predicted. 
     
     
         5 . The filter control device according to  claim 1 , wherein, when the image is enlarged by image processing, the filter controller sets the low-pass characteristics of the optical low-pas filter to be weaker than before the image is enlarged. 
     
     
         6 . The filter control device according to  claim 1 , wherein, when the image is reduced by image processing, the filter controller sets the low-pass characteristics of the optical low-pass filter to be stronger than before the image is reduced. 
     
     
         7 . The filter control device according to  claim 1 , wherein, while focus adjustment by a focus adjustment operation section is performed, the filter controller sets a low-pass effect of the optical low-pass filter to be weaker than when the focus adjustment is not performed. 
     
     
         8 . The filter control device according to  claim 1 , further comprising a Raw data recorder that records data indicating the low-pass characteristics of the optical low-pass filter together with Raw data. 
     
     
         9 . The filter control device according to  claim 1 , wherein the imaging device displays the shot image as a live view image. 
     
     
         10 . The filter control device according to  claim 1 , further comprising a low-pass filter effect setting section that is allowed to change the low-pass characteristics of the optical low-pass filter when a magnification of a live view image is changed. 
     
     
         11 . The filter control device according to  claim 1 , wherein
 the optical low-pass filter includes   a liquid crystal layer,   a first electrode and a second electrode that are disposed to face each other with the liquid crystal layer in between and apply an electric field to the liquid crystal layer, and   a first birefringent plate and a second birefringent plate that are disposed to face each other with the liquid crystal layer, the first electrode, and the second electrode in between, and   the low-pass characteristics are changed in accordance with change in voltage between the first electrode and the second electrode.   
     
     
         12 . A filter controlling method, comprising performing control on a shot image to cause low-pass characteristics of an optical low-pass filter mounted in an imaging device to be changed in accordance with a magnification of the image, the magnification to be changed by image processing. 
     
     
         13 . An imaging device, comprising:
 an optical low-pass filter; and   a filter controller that performs control on a shot image to cause low-pass characteristics of the optical low-pass filter to be changed in accordance with a magnification of the image, the magnification to be changed by image processing.